text: def add(a, b):
      print(f"ADDING {a} + {b}")
      return a+b
  
  def subtract(a, b):
      print(f"SUBTRACTING {a} - {b}")
      return a-b
  
  def multiply(a, b):
      print(f"MULTIPLYING {a} * {b}")
      return a*b
  
  def divide(a, b):
      print(f"DIVIDING {a} / {b}")
      return a/b
  
  print("let's do some math with just functions!")
  
  age=add(30,5)
  height=subtract(78,4)
  weight=multiply(90,2)
  iq=divide(100,2)
  
  print("Age: {age}, Height : {height}, Weight: {weight}, IQ: {iq}")
  
  print("here is a puzzle")
  
  what=add(age, subtract(height, multiply(weight, divide(iq,2))))
  
  print("That becomes:",what ,"Can you do it by hand?")
  